feat: 투표 관련 기본로직 및 도메인 작성 (#17)

src/main/kotlin/com/mz2mo/domain/emoji/Emoji.kt

@@ -0,0 +1,8 @@
+package com.mz2mo.domain.emoji
+
+data class Emoji(
+    val id: String,
+    val emoji: String,
+    val name: String,
+    val usable: Boolean
+)

src/main/kotlin/com/mz2mo/domain/vote/CreateVote.kt

@@ -0,0 +1,7 @@
+package com.mz2mo.domain.vote
+
+data class CreateVote(
+    val emojiId: String,
+    val userId: String,
+    val musicId: String
+)

src/main/kotlin/com/mz2mo/domain/vote/QueryVoteUseCase.kt

@@ -0,0 +1,5 @@
+package com.mz2mo.domain.vote
+
+fun interface QueryVoteUseCase {
+    fun getVotes(musicId: String): List<Vote>
+}

src/main/kotlin/com/mz2mo/domain/vote/Vote.kt

@@ -0,0 +1,8 @@
+package com.mz2mo.domain.vote
+
+data class Vote(
+    val id: String,
+    val emojiId: String,
+    val userId: String,
+    val musicId: String
+)

src/main/kotlin/com/mz2mo/domain/vote/VoteController.kt

@@ -0,0 +1,25 @@
+package com.mz2mo.domain.vote
+
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/api/v1/votes")
+class VoteController(
+    private val voteService: VoteService
+) {
+    @PostMapping
+    fun vote(createVote: CreateVote): Vote {
+        return voteService.vote(createVote)
+    }
+
+    @GetMapping("/by-music/{musicId}")
+    fun getVotes(
+        @PathVariable("musicId") musicId: String
+    ): List<Vote> {
+        return voteService.getVotes(musicId)
+    }
+}

src/main/kotlin/com/mz2mo/domain/vote/VoteService.kt

@@ -0,0 +1,23 @@
+package com.mz2mo.domain.vote
+
+import org.springframework.stereotype.Service
+import java.util.UUID
+
+@Service
+class VoteService : QueryVoteUseCase, VoteUseCase {
+    private val votes = mutableListOf<Vote>()
+
+    override fun getVotes(musicId: String): List<Vote> =
+        votes.filter { it.musicId == musicId }
+
+    override fun vote(createVote: CreateVote): Vote {
+        val vote = Vote(
+            id = UUID.randomUUID().toString(),
+            emojiId = createVote.emojiId,
+            userId = createVote.userId,
+            musicId = createVote.musicId
+        )
+        votes.add(vote)
+        return vote
+    }
+}

src/main/kotlin/com/mz2mo/domain/vote/VoteUseCase.kt

@@ -0,0 +1,5 @@
+package com.mz2mo.domain.vote
+
+fun interface VoteUseCase {
+    fun vote(createVote: CreateVote): Vote
+}